Rowan & Martin's Laugh-In (often simply referred to as Laugh-In) is an American sketch comedy television program that ran for 140 episodes from January 22, 1968, to March 12, 1973, on the NBC television network. It was hosted by comedians Dan Rowan and Dick Martin and featured, at various times, Chelsea Brown, Johnny Brown, Ruth Buzzi, Judy Carne, Richard Dawson, Moosie Drier, Henry Gibson, Teresa Graves, Goldie Hawn, Arte Johnson, Larry Hovis, Sarah Kennedy, Jeremy Lloyd, Dave Madden, Pigmeat Markham, Gary Owens, Pamela Rodgers, Barbara Sharma, Jud Strunk, Alan Sues, Lily Tomlin, and Jo Anne Worley. Laugh-In originally aired as a one-time special on September 9, 1967, and was such a success that it was brought back as a series, replacing The Man from U.N.C.L.E. on Mondays at 8 pm (ET). The title of the show was a play on the "love-ins" or "be-ins" of the 1960s hippie culture, terms that were, in turn, derived from "sit-ins", common in protests associated with civil rights and antiwar demonstrations of the time.